SU1284493A1 - Line for asptic preserving of liquid and puree-like products - Google Patents

Description

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The invention relates to aseptic preservation lines and can be applied in the canning industry as well as in the dairy and microbiological industries.

The aim of the invention is to increase the reliability of the line, improve the quality of the product, shorten the duration of the start-up period.

Figure 1 shows the scheme of the proposed line; figure 2 - diagram of the heater with a sectional steam jacket.

The aseptic canning line contains a receiving tank 1, a product feed pump 2, a heater 3, a holding device 4 (a stand), a cooler 5, an automatic switchgear (AGC) 6 installed after the heater 3, a pressure regulator 7 before itself installed after AGC b on the product recirculation pipeline to the receiving tank 1 AGC 8, installed after the retainer 4, pressure regulator 9, installed before the AGC 8, product recirculation pipeline from the solenoid boilers 4 to the receiving tank 1, a temperature sensor 10 with a regulator 11, an electric contact pressure gauge 12, a pressure gauge 13, a circuit for automatic control of the product in the heater, a temperature sensor 14 that is turned on, a steam regulator 15 and a regulator 16, valves 17-24.

The heater 3 consists of a housing 25, a rotor 26 with knives for cleaning the heating surface, nozzles 27 and 28 for supplying and discharging the product, a steam jacket 29 divided into sections 30. A section 30 of the steam jacket is connected by valves 31 and 32 to a common regulator steam supply and valves 33-35 to the condensate system.

The line also contains a collection 36 for storing a sterilizing solution, storage tanks for a sterile product with an air sterilization device (not shown).

During the start-up period, steam is supplied to the separator by means of a valve 37, which prevents boiling of the product when it enters the extractor.

The aseptic canning line works as follows.

The product enters the line through the "Product Flow" pipeline and through valve 17 enters the receiving tank 1. Through valve 19 with pump 2, the product is fed into heater 3. After filling heater 3, the product reaches AGC 6, which is automatically set to the "Return due to that the product does not have a predetermined temperature, and through the pressure regulator 7 up to itself enters the product return pipeline to the receiving tank 2. The pressure regulator 7 sets the predetermined pressure in the system, after which the electrical contact pressure gauge 12 p gives a signal to

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the steam supply and the controller 15 starts the steam supply to the heater jacket.

Before starting the line, valves 31 and 32 connect the required number of sections of the steam jacket of heater 3, depending on the line capacity and type of product, its initial temperature and sterilization temperature. In this case, the latter, in the course of the product, the section is always on, and the subsequent sections are connected from it against the movement of the product. Valves 33-35, connecting the sections of the steam jacket of the heater to the condensate line, establish the same vapor pressure in the sections. Thus, the duration of the heat treatment of the product in the heater is minimal.

The product temperature is controlled by the sensor 14, the signals of which are fed to the input of the steam supply controller 15, which, through the regulator 16, by changing the amount of steam, maintains the desired product temperature. When the product reaches a predetermined temperature by a signal from the sensor 14, the controller 15 sends a command to the AGC 6 to switch the supply of product to the holding device 4. The product, heated to the temperature of the system, enters the holding device 4, installed between the heater 3 and the cooler 5, and therein the time required to sterilize it.

To prevent the product from boiling up when entering the stand during line start-up, the stand is filled with steam through a separate pipeline with valve 37. A vapor pressure is established in the gauge 13 to prevent the first portion of the product from boiling off.

After the AGC 6 has been triggered, when the separator begins to fill with the product, the valve 37 is closed to prevent the product from entering the steam line. Further, when the sealer is already filled with the product, the necessary pressure is provided by the pressure regulator 9 up to itself.

From the holder 4, the product enters the regulator 9 "to itself, which maintains the pressure in the controller 4 and the AGC 8, which dries the product out either for further processing to cooler 5 or for recycling through the pipeline" Return to the receiving tank 1. Moreover, in the normal mode of line start-up and short stops in operation, as a rule, there is no need to return the product via AGC 8 to the receiving tank. At the same time, in case of failures during the start-up period or during long stops, the presence of AGC 8 allows, without having to be contaminated with non-sterile product, cooler 5, sterilize the product 4 with the product and continue working. To do this, a time relay is integrated in the controller 11, which turns on after each AGC 8 triggers to the Return position and, when the set temperature is reached, delays the AGC 8 switching to the position of dispensing the product to the cooler 5 for a time equal to the sterilization duration.

After the AGC 8 is switched to the dispensing position, the product enters cooler 5, where it is cooled to 35-40 ° C and transferred to aseptic storage tank (not shown).

A sterilizer preparation site (not shown) is provided in the line to ensure the sanitary processing of the pipelines and apparatuses. The prepared solution is stored in a collector 36, from which it enters the line through valve 18. After use, the sterilization solution is returned to the tank 36. Regulators

pressures up to 7 and 9 maintain up to a constant excess pressure necessary to heat and maintain the sterilization temperature of the product (130-140 ° C).

The advantage of the proposed aseptic preserving line is the implementation of the steam scrubber of the heater in the form of separate sections, which allows, if necessary, to reduce the amount of heat transfer surface of the heater and thereby prevent excessive heat treatment of liquid products, the heating time of which is in seconds.

The AGC located between the heater and the control device directs the underheated product to additional heating to the desired temperature, preventing contamination of the controller with a non-sterile product. The last sterilization of the holder causes a considerable excessive overheating of the product. .

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Claims (2)

1. LINE OF ASEPTIC CONSERVATION OF LIQUID AND PURPE-SHAPED FOOD PRODUCTS, containing a receiving tank, a pump, a heater, a cooler and a cooler, as well as a pressure regulator "to itself", installed in front of an automatic dispenser located between the cooler and a cooler, a product recirculation pipeline, an automatic product temperature control loop in a heater, characterized in that, in order to increase the reliability of operation, improve product quality and reduce the duration of the starting period, it is sn It is optionally installed with an additional switchgear located on the product supply line between the heater and the cooler and a pressure regulator "to itself", installed behind the additional automatic switchgear on the product recirculation pipeline. 2. The line along π. 1, characterized in that § that the steam jacket of the heater is made sectional. SU ,, „1284493 g